package com.atguigu.springcloud.lb2;

import org.springframework.cloud.client.ServiceInstance;
import org.springframework.stereotype.Component;

import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * @author machuan
 * @create 2021-08-09 5:00 下午
 **/
//@Component
public class mylb123 implements Lbance{
    private AtomicInteger atomicInteger=new AtomicInteger(0);
    public final int getAndIncrement(){
        int current;
        int next;
        do {
            current=this.atomicInteger.get();
            next =current>=Integer.MAX_VALUE?0:current+1;
        }while(!this.atomicInteger.compareAndSet(current,next));
        System.out.println(next);
        return next;
    }

    @Override
    public ServiceInstance instence(List<ServiceInstance> serviceInstances) {
        int index = getAndIncrement() % serviceInstances.size();
        return serviceInstances.get(index);
    }
}
